Valve



y 22, 1952 w. HUNTINGTON EI'AL 2,604,107

VALVE Filed Oct. 17, 1949 I 2 SHEETSSHEET 1 WILLIAM L. HUNTINGTON MELV|N G. SOGGE (Iltorneg Znwentor Patented July 22, 1952 t t Q VALVE William L. fiu'iltjhgtbn, Minneapolis, apd Melvi n G. se'ggie, St. PauL Mimi ""tighfqrtp' e= apFb lis ljIo'j 'eywll Regula. r Cb 1' hp ahy M nneaiioli, Miifm, a ''o'rpora'tldii of Delaware Application October 17, 1949; Serial N'o iZ IQS i Z; I 1 3 came. (01'. 136 86) I This. iil'vhtin relates to safety valv s general: r'injr e I 2 13f a'fid, 'hib're particularly, tofiiri-breverpentg in line fF re l' I a'fetvvallves'fdfuse in gas fqiiiabe installatiqns Figuie 3 is ectlofial vlew takepalong t'pi'bvfde'idi theishattin 'ofi ei gesto betnthe ii'n'e 3 45f E'i II I I II I I: Figilre 4 is a plan View of the safety valve With main bli'fner the pilbt btirner wheiivef the 5 iiilethfiifii" name as bediiie extin uishe II safety valv'ee hi this ty e are we l known in the heating 9ft. Sfii bf the Wll kilOWfl Valves uh I ethe'pfincible dfa. temperature responsive I I member, "s'l'lhas a i'od afid t i'ib'e' 01" a bimetallic I v member for latching dr holding the inain and iii the 16wei eas lflg A 1;1"n 11 e Ii P P- pilot valvesortne safety valve intheir open 130- bb i'ti' fi ta'e oy 56 the qas jsitions, as long as a flame ispi'esent at the il'et b'fo" d' a fas ti'ght'SaI 1b 6 5 j f iiif 'pepani burner, bi'it moving to a position which perfnits II I as h said valve to cloe when said flame becbfnes-xti'n'gu'ish'ed, Othei'S' makeus'e 6f a, thermbcduple energized elebti'h'fhag'h't for holding the main and p'ilbt valves in their (men positions, due 'to the presence of a flame at the pilot burner which II is pOSitiOIIIGd t6 heat the thiifioboublg but which felfiSes the VQJIVE'S to their lbs'ed liositidils lipoli the pilot burner." fiilhi'e becbfiiih'g' extinguished and tht'ls denergi'z'iilg the eltidiflaghet.

The present inventio'ri is pfir'r'iafily eohcrned with the last mehtibfied type Of safety Valve, that is, a thermooupl' "cbnti'oli'd maiii and piiot valve responeive to the presence o'r' absence of a pilot burner name. I

An object of the ii'lv'ntidii is t6 iafc'jvide a safety I shut=bff valve of the" tyfi dciibd which is of ieliable construction I I A other object at the nvent on is t6 provide a I M I k, mw' c St safety valve hav'ifig main and'pimt valves valves; repeetivelyi Wemea t6 the quiet ISnIIII therein, both 6f which are new in their o en face pater fi I T iure 1,1512. pe'si'tien by means or a therxnneeuble energi'zabie 3'5 s ape 'b'fakt 'i in "er 3'0 a ing' 9;; her 31 lebtromagnet. thei'iii 'ih' 'aizia'l align W1 H th 'bUr t6 Still anbthe'r Objt df the ifiVeh'tibn to pro vide a main and pilot blfi'i'ir 'co'fitrdl valve which is manually f'e'stt'able b? a Simple but sturdy I, me-ehnnism w initiate gas new "06 the piIgt bu efa'nd thri, if a flame is bresent at the pilot buinei', t6 iifitiateaii'd filaihtain gas flow to the main'burner. I II I I Still another bjt er the inver'ition is to pro: II gr i vide a 'afety valve pfdifid'ihg a straight through 45 115" the vaw'e' zo 'ai'id-as acdfiileftlii'ii'fieanffii' g'a's pa's'ag' there-iii enq wherein the guides for Sfi lv t the valves therein are formed in a singl plate 5"1p V t1 1eSt I fi33 isl'ie f1 axial alig i ent with clamped between main body portions of the safethe outlet I1 afitliv'ft y Slid'abie the lzio es ty valve. I I II I 31;. A' chtif'aiiy .apitniea cup sh a'b'ed sun other objeets of the invention will become 50 member 34 bee-re at itenppen eee agaiht th apparent u dn reading the fdllbwihg detailed debfittfi'ffi 0f s'fibti'dn 6f the invention in conjunction with the ve ve Stein It I I aebl'hiiahying drawings Whef'ei'n: iioftiojxi 35 15$ ns bf a igure 113 aveiticalseetionalview an thlhtianee'inen gule'r ,era II EitHdinaI axisof the safety valve; 55 scbnd i'nvit'd and ehtfally aperfiiird clipshaped member 31 surrounds the stem 33 and bears against the under surface of the plate 24. A spring 38 is held coaxial with the stem 33 by the sidewalls of the cup-shaped members 34 and 31, against the bottoms of which the ends of the spring bear. It is thus seen that the spring 38 normally holds the downwardly depending rib 20a of the valvehead in seated engagement with the valve seat l9. To provide for vertical movement and opening of the main valve, an annular groove 39 is provided in the stem 3'3 to receive the forked end'of an actuating means. to be presently described.

the lever 44 with a looped portion of the legs of the U-shaped spring encircling the cross bar 54.

Manual means for actuating the valves to their operating positions comprises a crank member 56 having a crank arm adapted to engage a horizontally extending arm 44a. on the lever 44 as the crank member,56 is rotated through an angle of 90. Further rotationof the crank member will cause the lifting of the arm 44a and the lever 44, with the consequent lifting of the pilot valve 23. The rotation of the crank member 56 is ac- .Icomplished by rotating a manually engageable The above mentioned pilot valve 23 is secured to a valve stem 40 by being clamped to said stem' between'a washer 4i and an inverted and apertured cup-shaped member 42 positioned against anannular shoulder on said stem. A lower end knob 58 externallyconnected to a shaft 59 which in turn is connected to the crank member 56. A rubber washer 60 having an inner diameter smallerthan the diameter of the stem 59, is held in place in a recess in the outer surface of the Y casting II by means of a tightly fitting metallic of thestem is screw-threaded into a hexagonal extension member 4011 which is vertically 'slidable' in a recess 21a formed in the bottom of recess 2 I. This construction prevents a pistonjaction of the extension 404; in guide recess 2la. The upper portion of the valve stem 40 passes through the bore 29 in the plate 24 for guiding the vertical movement of the stem. I

Pivotally mounted on the pilot valve stem 40 by means of a pivot 43 is a channel-shaped lever 44 having a, forked end thereof extending trans versely of the mainvalvefstem 33 in the annular groove 39 therein. '11; is thus'seen that vertical movement of the forked end 45 ofthe lever 44 will cause' the lifting of the valve 20 off of its valve seat to provide for the flow of gas through the outlet I1. The right-hand end of the lever 44, as seen in Figures 1 and 3, is of open frame construction to permit the passage of the valvestem 40 therethrough betweenthe side walls thereof. The side walls are vertically slotted at 46 to re-' ceive the pivot 43 and permit relative'vertical movement between said pivot and the lever, forfa purpose to be more fully understood hereinafter. The slot 46 is so positioned that the pivot 43 rests intermediate the ends thereof when the main valve 20 is seated and the right hand end of the lever 44 rests on a shoulder 41 formed on the inner wall of the lower casting ll. Two generally Z-shaped members 48 and 49 are welded orotherwise secured to the plate 24 on oppositesides' of the valve stem 40 with the lower portions thereof extending transversely substantially to the right hand end of the lever 44, but spaced downwardly therefrom. A pair of'tension springs 50, andp5l, having screw threaded lower end portion and hook-shaped upper end portions, are adjustably secured to the lower portions of the legs 48 and 49, respectively, by adjusting screws 52 and 53, respectively. The upper hook-shaped portions of the springsand 5| are adaptedto'engage in annular grooves in a cross bar 54 extending transversely through-and beyond the side walls of the lever 44. The point atwhich'the cross bar passes through the lever 44: is such that springs 50 and 5| tend to rotate the leverf44' about the abutment shoulder 41 as it pivots'tourge the main valve 2!] closed, aside from the action of the spring 38. Also, the springs 55 and 51 hold'th'e lever 44, firmly in itslow'ermost positionso that a light generally U -shaped spring 55', anchored to the lever 44 at its base with thefree ends or'the legs thereof extending downwardly in angular groovesf'nea'r the ends of the' pivot 43, cause the valve 23 to firmly engage the valve 'seat 22 jfThe spring Bids-"anchored to the leve '44 by having the face 'of'the -U '-shaped spring 'cro'ss'the' top of washer Bl to form a gastight seal between the casting I l and the stem;59. A pointer 58a is provided on the knob to cooperate with a plate 62 carrying indicia to indicate the position of the crank arm 51 at all times. The knob 58 is held on the crank shaft orstem 59 by means of a lock washer 63 and screw 64. The indicia plate 62'has a flat upper portion which bears against a fiat shoulder on the lower casting I l' to prevent rotation thereof and is held against the end of the lower casting by means of a washer 65 and a Well known clip spring 66 engaging an angular groove in shaft 59 adjacentthe washer,65.. r H r a The means for holdingthe pilot valve 23 in its open position: is an electromagnet having a U- shaped core member 61 centrally apertured in its-base portion to "receive'la stud 68. The stud is staked to hold the core 61 on the inner wall of the easting l2. Mounted on one of the legs of the core 6? is a conventional low voltage coil J69 which is adapted to be'energized by a thermocouple. Leads 'lilfroin the ends of the coil are connected to the inner ends of electrical terminal screws 'I l extending througha terminal block 72 made of insulating material. The terminal block 12 is secured to" the upper casting l2 with a sealing gasket 73' therebetween, by means of bolts-14 freely passing through the terminal block and screw-threaded into suitable aligned and threaded bores lnot shown) inthe casting l2. The coil 69 is resiliently but firmly held on the core and against the lower'end of the stud 68 by means of a U-shaped leaf spring 75, the center portion of which bear against thecoil while theends thereof bear against the plate 24. 'I he core 6! is prevented'from rotating on'the stud 68 by means of ribs (6 formed on the. inner sure face'of the casting l2. An armature 71,'m'ntioned above as being secured to the upper end of stem 49, abuts a shoulder on said stem and is held thereon by means of a conventional clip 18 fitting in an annular'groove in the stem. The electromagnet and armature are separated from the inlet l2a and the other gas passages'by. a partition wall 212; formed in the upper casting I2, and by the plate 24 which bears against it. While this junction of the wall I 22) With plate 24 is preferably a gastight one, it is not absolutely necessary that such be the case. i

Operation the crank arm 51 into engagement with lever arm 44c. Continued clockwise movement of the knob will cause upward movement of the right hand end of the lever 44, about the groove 39 inthemain valve stem as a pivot, to raise the lever 44; against the pivot 43 and thus move the pilot valve to its open position,-with the armature 11- in engagement with the electromagnet core 61. The knob must be held in this last mentioned-position for a suflicient time for the pilot burner to heat the thermocouple to theextent ne'cessary for saidthermocouple to supply suificient electrical current to the electromag net. The current will pass through the electrical terminals fll to. hold the armature H, in en gagement with the electromagnet against the biasofsprings 50 and 5|, and 38, when the knob 58 has been rotated counterclockwise to its starting position. Sh0uld the armature 11 be held by the electromagnet, indicating that the ,pilot flame is of necessary intensity, as well as being present, the springs 50 and .5l w hich are -much stronger than the spring 38 will rotat lever 44 aboutpivot 43 to raise the main valve-20 offof its seat against the bias of spring 38. The valve element will remain in their positions so long as the pilot burner remains lighted and is of the desired intensity. 7

Should the pilot flame become extinguished or lower in intensity to the point whereinit does notzprovide a flame suitable for igniting ga at the main burner, and thus become insufficient to heat the thermocouple to the temperature necessary to deliver suflicientcurrent to the electromagnet, springs 50,51, 55 and 38 will cause the main and pilot valves to close. It is thus seenf'tha tthe main valve cannot be opened by themanual reset means unless there is asuflicient flame present atthe pilot burner to-cause the armature 1'! to beheld by the electromagnet. This provides safe ignition of the heating system atthe beginning of the heating season or after a safety shutdown of the system. v

While the preferred construction of the invention has been described above, it is obvious that modifications; may be made therein without departing" from the, spirit of, the invention. The scope ofthe invention should therefore be deter'inined solely from the appended claims.

We claim as our invention: l 1. A device of the classdescribed, comprising a mainb'iased-closed valve controlling fluid flow through a main outlet, a secondary valve c on-' trolling fluid flow through a secondary outlet, an inlet commonto bothof said valves, means responsive to a conditionior holding saidsecondaryvalve in its open position when a predeter mined condition exists, an actuating lever for saidvalves having one end thereof engaging said mainvalve, a lost motion connection between said secondary valve and an intermediate por tion ofsaid lever, biasing means between said leverand said secondary valve for urging said secondary valve toward its closed position, an abutment 'engageable by the other end of said lever, biasing mean engaging said lever between said secondary valve and said other end of said lever with'a force greater than the closing bias on said main valve for urging said lever in a direction closing said valves when said secondary valve is closed and for'opening said main valve against its biaswhen the condition responsive means is holding said secondary valve open, and means positioned to engage said other end of saidlever for moving. said secondary valve tozits open position and into. engagement with and holding means.

2. A device of the class described, comprising a main biased-closed valve controlling fluid flow through a main outlet, a secondary valve controlling fluid flow through a secondary outlet, an inlet common to both of said valves, means responsive to a conditionfor holding said secondary valve in its open position when a predetermined condition exists, an actuating lever for said valves having oneend thereof engaging said main valve, a pivotal connection between said secondary valve and an intermediate portion of said lever, biasing means engaging said layer betweenfsaid secondary valve and said other end of said lever with a force greater than the bias on said main valve for urging said lever in a direction closing said secondary valve and for opening-said main valve against its bias when said condition responsive means isholding said secondary valve open, and means p'o'siti'oni'a'dto engage said' other end of "said lever for moving said secondary valve to its open position and into engagement with said holding means.

. 3. A device of the class described, comprising a main valve controlling fluid flow through a main outlet, a secondary valve controlling fluid now through azsecondary outlet, an inlet common to both of said valves, means responsive to seem dition for holding said secondary valve in its open position when a predetermined condition exists, anactuating lever for said valves having one end thereof pivotally engaging said main valve, a pivotal connection between said secondary valve and an intermediate portion of said lever, an abutment engageable by the other end of said lever, biasing mean engaging said lever between said secondaryfvalve and-said other end of said: lever for urging said lever in a direction closing said valves andfor pivot" s'aid'lev'er about said connection to open-said'inaifi' valve when said secondary valve is held by said holding means, and means positioned to engage said other end of. said lever ior moving said secondaryvalve to its open position and into-engagement with said holding means.

.4. A device of the mass described coinprising-a main biased-closed valve controlling fluid now through a main outlet, asecondary'valv con: trolling fluid flow through a secondary outlet, an inlet common to both 'of said va1ves,means responsive to a condition for holding said's'c ondary valvei'nits open position when a are determined condition exists, saidmeans com prising an armature connected to" said secondary valve andan electromagnet, an actuating lever for said valves having one end thereof engaging said main valve, a pivotal connection -be= tween said secondary valve and an intermediate portion of said lever, an abutment engageable by the other end of said lever, biasing. means engaging said lever between said secondary valve and said other end of said lever with a force greater than the bias on said main vaive-ror urging said lever in a direction closing said valves and for opening said main valve against its bias when said condition responsive means is holding said secondary valve open, and means positioned to engage said other ei-id of saidlever for moving said secondary valve to its open po-' sition and into engagement with said holding means, said last mentioned means comprising a crank having a rotatable shaft the axis of which is substantially parallel to the longitudinal axis of said actuating lever. i r

- 5. A device of the classvdescribed, comprising a main valve controlling fiuid flow through a main outlet, asecondary valve controlling fluid flow throughfa secondary outlet, an'inlet common to both of said valves; means responsive to a condition. for holding saidsecondary valvein its open position when apredetermined condition exists, said means comprising an. armature connected to saidsecondary valve and an electromagnet, an actuating lever for said valves having one end thereof pivotally engaging said main valve, a pivotal connection between said secondary valve and .an intermediate portion of said lever, an abutment engageable by the other end of said lever, biasing means engaging said lever between said secondary valve and said other end of saidplever for urging said lever in a direction closing said valves and for pivoting said lever about said connection .to: open said main valve when'said secondary valve is held by said holding means,'and' mean positioned "to engage said other end of said leverfor moving said secondary valve to its open position and into engagement with said holding means. 6. A safety shut-oiT.valve comprising-a valve body having an inlet and first and second outlets, a first valve for said first outlet, a second valve for said second outlet, an abutment in said valve body, a lever pivotally. engaging said first valve atone of its ends and resting 'onsaid abutment at the other endthereof, said lever' having a lost motion connection intermediate its ends with said second valve condition-responsive means-for holding said second valve in its open position, meansv acting on said :lever inwardlyof said other,,end of saidlever for movingsaid lever in a-direction tending to closeisaid V val es when said lever i resting on said abutment and for rocking said lever. about said .lost motion connection to open said first valve; When said condition responsive means is holding said second valve, and means, for lifting said other end of said lever off of said abutmentito move saidsecond valve to its open position.

7. A safety shut-off devicecomprising a valve body having an inletand first and second outlets, a-first ,valvepfor saidl-first outlet, a second valve for said second outlet, a lever pivotally engaging said firstvalve at one of its'ends and having a pivotal connection intermediate its ends with said second valve,,re1easable means for holding vsaidasecond-valve in its open. position, means acting on said .lever inwardly of the other end of said lever for, movingsaid lleverein a direction tending to cl0se.-said second valve and for rocking said lever about said pivotal connection to open said first valve when said releasable means is holding said second valve, and

manually operable means forlifting said other end of said lever to move. said second valveto it open position; ,7

8. A safety shut-off valve comprising a valve body having'an inlet and first/and second outlets, a first .valve for saidv first outlet, a second valve for said second outlet, an abutment in said valve body, a lever pivotally engaging said first valve at oneof its ends and resting on'said abutment. 'at-theother end thereof, said lever having a pivotal connection intermediate its ends with; safid.second valve; releasable means for holding said second ;valve in its open position, means between said second-valve and! said lever for urging said second valve toward its closed position and away from said lever,.ineans acting on said lever inwardly ofssaid'oth'er end of means 'for controlling said lever for moving said lever in a direction tending to close said valves when said leveris resting on said abutment and for rocking said lever about said pivotal connection to open said first valve when said releasable means is holding said second valve, and manually operable means for lifting said other end of said lever off of said abutment to move said second valve to its open position. r v

9. A safety shut-off valve comprising a valve body having two generally cup-shaped portions joined together, an inlet in one of saidportions, a first outlet in 'the other of said portions in axial alignment with said inlet, a plate clamped between saidportions havin openings in alignment with said inlet and outlet, a biased closed main valve cooperating with said outlet and having a stem extending through one of said openings in said plate for guiding said valve with respect to said outletja second outlet laterally spaced from said first outlet, a second valve cooperating withsaidsecond outlet and having a stem extendingthrough an opening in said plate, an armaturesecured to said second'valve stem on the opposite side of'said plate from said second valve, an electromagnet positioned to be engaged by said armature when said second valve is in its open position, a lever pivotally engagin the main valve stem at one end thereof and the second valve stem intermediate its ends, means biasing the other end of said lever in a direction tending to close said second valve, and manually operable means for lifting said other end to open said second valve and to position said armature againstsaid electromagnet,fsaid biasing means'bein'g operable upon return'move- V ment of said manually operable means to move said main valve toopen position'if said electromagnet is'energized. l V 10. A safety shut-off valve as defined in claim 9 wherein said manually operable means compris'es'a rotatable shaft extending through said valve body substantiallyparalleltothe longitudinal axis of said lever; f i

' 11. A safety-device comprising a support, first means for controlling the flowoffuel to a first burner; second means for'controlling the flow of fuel to a second burner, a-lever pivotally engaged at one of its ends to said first'meana'said lever being pivoted intermediate its'ends to said second means, means for releasably holding said secondmeans in its position permitting fuel flow, first; biasing means acting on said lever near theother end of said'lever'for moving 'said'second means to its position stopping fuel flow When'it is free to so move or'f-or rocking said lever about its pivoted connection with said second means to move said-first meansjto its position permitting fuel flow, second biasing means weaker than-said first biasing means for moving said first means to'its position stopping fuel flow, and means engaging said other end for-moving said lever into engagement with-said holdingmeans. Q I 12. A safety deviceco'mprising a support, first the flow of fuel to afirst burner, second means for controlling the flow of fuel to a second burner, alever pivotally engaged at one of its ends to said first means, said lever being pivoted intermediate its ends to said secondmeans, condition responsive means for releasably holding-said second 'means in its position permittingfuel fiow, first biasing means acting on said leve'r near the other end of'sai'd lever for movingsaid second means to its posi tion stopping fuel flow when it is free to so move or for rocking said lever about its pivoted connection with said second means to move said first means to its position permitting fuel flow when said condition responsive means is holding said second means, second biasing means weaker than said first biasing means for moving said first means to its position stopping fuel fiow, and means engaging said other end for moving said lever into engagement with said holding means.

13. A safety device comprising a support, first means for controlling the flow of fuel to a first burner, second means for controlling the flow of fuel to a second burner, a first-electromagnetic member connected to said second means, a lever pivotally engaged at one of its ends to said first means, said lever being pivoted intermediate its ends to said second means, a second electromagnetic member cooperable with said first electromagnetic member for releasably holding said 20 second means in its position permitting fuel flow, first biasing means acting on said lever near the other end of said lever for moving said secondv REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,309,709 Paille Feb. 2, 1943 2,481,265 Van Denberg Sept. 6, 1949 

